Section [ ] Stormwater Catch Basin Filtration Device

Transcription

1 PART 1 GENERAL Section [ ] Stormwater Catch Basin Filtration Device Purpose The purpose of this specification is to establish generally acceptable criteria for devices used for filtration of stormwater runoff captured by catch basins with curb openings. It is intended to serve as a guide to producers, distributors, architects, engineers, contractors, plumbers, installers, inspectors, agencies and users; to promote understanding regarding materials, manufacture and installation; and to provide for identification of devices complying with this specification Description Stormwater Catch Basin Filtration Devices (SCBFD) are used to filter stormwater runoff captured by catch basins. The SCBFD is a filter system composed of a filtration basket, media filtration boom and a shelf system. SCBFDs are used to remove various pollutants from stormwater by means of screening, separation and media filtration Manufacturer The manufacturer of the SCBFD shall be one that is regularly engaged in the engineering, design and production of systems developed for the treatment of stormwater runoff for at least (10) years, and which have a history of successful production, acceptable to the engineer of work. In accordance with the drawings, the SCBFD(s) shall be a filter device manufactured/distributed by Bio Clean Environmental Services, Inc., or assigned distributors or licensees. Bio Clean Environmental Services, Inc. can be reached at: Corporate Headquarters: 398 Via El Centro Oceanside, CA Phone: (760) Fax: (760) Submittals Shop drawings are to be submitted with each order to the contractor and engineer of work Shop drawings are to detail the SCBFD, its components and the sequence for installation, including: SCBFD configuration with primary dimensions Various SCBFD components Any accessory equipment Inspection and maintenance documentation submitted upon request Work Included Specification requirements for installation of SCBFD Manufacturer to supply SCBFD(s): Filtration Basket Shelf System Trough and Weir Media Filtration Boom Stormwater Catch Basin Filtration Device Page 1 of 6

2 Media Filtration Boom shall be provided with each Filtration Basket housed in nylon netting and securely fastened entrance to the Filtration basket. Each media boom shall contain polymer beads to permanently absorb hydrocarbons Reference Standards ASTM E (2004)e1 ASTM A 240 ASTM F 716 ASTM F 726 ASTM D ASTM D ASTM C ASTM D 638 ASTM D 790 ASTM D 648 ASTM D 2583 ASTM D 4097 ASTM D3409 IFI 114 Standard Specification for Industrial Woven Wire Cloth Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications Testing Sorbent Performance of Absorbents Sorbent Performance of Absorbents Standard Test Method for Bursting Strength of Textiles-Constant-Rate-of-Traverse (CRT) Ball Burst Test Standard Test Method for Isophthalic Acid in Alkyd and Polyester Resins Standard Specification for Contact-Molded Reinforced Thermosetting Plastic (RTP) Laminates for Corrosion-Resistant Equipment Standard Test Method for Tensile Properties of Plastics Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials Standard Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position Standard Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impressor Standard Specification for Contact-Molded Glass-Fiber-Reinforced Thermoset Resin Corrosion-Resistant Tanks Standard Test Method for Adhesion of Asphalt-Roof Cement to Damp, Wet, or Underwater Surfaces Break Mandrel Blind Rivets PART 2 COMPONENTS Shelf System Components Main Trough System & Weir shall be manufactured of 100% marine grade polyester resin and fiberglass strands. The entire fiberglass structure must be coated with a polyester gel coating with ultra violet inhibitors incorporated into the coating for maximum ultra violet protection. Fiberglass must have a minimum thickness of 3/ Mounting Hardware shall be 100% non-corrosive metals. Nuts and Bolts Rivets Support Brackets Concrete Anchors Concrete Filler and Sealant shall be made of Acrylic Emulsion and have a minimum service temperature range of -30 F to 150 F. Stormwater Catch Basin Filtration Device Page 2 of 6

3 Filter Basket Components Filter Housing shall be manufactured of 100% marine grade polyester resin and fiberglass strands. The entire fiberglass structure must be coated with a polyester gel coating with ultra violet inhibitors incorporated into the coating for maximum ultra violet protection. Fiberglass must have a minimum thickness of 3/ Screens shall be manufactured of 304 stainless steel mesh constructed per ASTM E (2004) Handles shall be manufactured entirely of aluminum and be mounted to the filter housing using mounting hardware per section Media Filtration Boom Filter Boom media shall be made up of granulated oil absorbing polymers that have been tested in accordance with section 11.2 of ASTM F Filter media must be proven to absorb 180% of its weight within a 300 second contact time, and at this absorption percentage the physical increase in the size of the granules is not more that 50%. Filter netting shall be 100% polyester with a number 16 sieve size, and strength tested per ASTM D PART 3 PERFORMANCE General Function - The SCBFD has no moving internal components and functions based on gravity flow, unless otherwise specified. The SCBFD is composed of a Shelf System and a Filter Basket. Runoff enters the SCBFD from a curb opening and flows into the Shelf System which is mounted under the face of the curb opening. It then flows horizontally inside the Shelf Systems Trough to the Weir which holds the Filtration Basket. This Shelf System positions the Filtration Basket directly under the catch basin access point (manhole cover, grate or hatch). The Filtration Basket can be removed through the access point without disassembly. The Filtration Basket can also be cleaned without entering the access point by using a vacuum truck. Along the top perimeter of the Filter Basket is a tray containing a Media Filtration Boom. Water flows through and over the filtration boom and downward into the filtration basket. Stormwater enters the inside of the filtration basket and flows downward toward the bottom portion of the basket. Stormwater flow up to the peak treatment flow rate is processed through the filtration screens. These screens provide capture of TSS, sediment, particulate metals, hydrocarbons, nutrients, organics trash and debris. During the heaviest flows the basket fills with water and spills over the top to bypass directly into the bottom of the catch basin, while previously captured debris and solids are contained by a upper screen guard which prevents re-suspension Pollutants - The SCBFD will remove and retain debris, sediments, metals, nutrients, oxygen demanding substances, bacteria and hydrocarbons entering the filter during frequent storm events and specified flow rates. For pollutant removal performance see section Stormwater Catch Basin Filtration Device Page 3 of 6

4 Treatment Flow Rate - The SCBFD operates using gravity flow. The SCBFD treatment flow rate varies by size and is provided on the drawings for each model Bypass Flow Rate The SCBFD is designed to fit within the catch basin in a way not to affect the hydraulics. The area over the top of the Shelf System and Filter Basket is always greater than the curb opening area and/or the area of the outflow pipe. Therefore, the SCBFD does not create a critical point of restriction Pollutant Load The SCBFD must be designed to have minimum storage capacity as documented on the drawing for each particular size and model Performance Protocol and Results All lab testing on filtration media must be performed by an independent third party consultant and testing lab Test Performance At a minimum, the SCBFD shall be tested, according to section , and meet these performance specifications: Filter Pollutant Removal Table REMOVAL POLLUTANT EFFICIENCY TSS-(down to 100 microns) 93% Maintenance Performance Table Maintenance Activity Poor Fair Excellent Ease of Attachment/Reattachment to Drain Ease of Handling and Entry Through Manhole Ease of Cleaning and Filter Media Replacement Prevention of Debris Loss During Removal From Drain Overall Maintenance Turn-Around Time 5 Rating = 15 Minutes or Less Total Score 22 PART 4 - EECUTION General The installation and use of the SCBFD shall conform to all applicable national, state, municipal and local specifications Installation The contractor shall furnish all labor, equipment, materials and incidentals required to install the (SCBFD) device(s) and appurtenances in accordance with the drawings, installation manual, and these specifications, and be inspected and approved by the local governing agency. Installation contractor should possess a Confined Space Entry Certification Permit, pursuant to OSHA standards. Any damage to catch basin and surrounding infrastructure caused by the installation of the SCBFD is the responsibility of the installation contractor. Stormwater Catch Basin Filtration Device Page 4 of 6

5 Shelf System will be installed in accordance with manufactures recommendations. The Trough component will be installed the complete width of the curb opening, or underneath any wings as to provide 100% coverage of incoming stormwater. The Weir component of the Shelf System must be located directly under the manhole opening or other access point (not including the curb opening) regardless of its position relative of the curb opening. The Shelf System must be properly mounted and assembled inside the catch basin with drive pins and pop rivets per manufacture s recommendations. Once the Shelf System is secured to the walls of the catch basin all seams must be filled with sealant per section Filter Basket will be inserted through the manhole opening or access point of the Shelf System directly without entry into the basin. The Filtration Basket shall be fully visible from finish surface while looking into the access point for ease of inspection and maintenance. The curb opening itself is not a point of access as maintenance personnel cannot enter Shipping, Storage and Handling Shipping SCBFD shall be shipped to the contractor s address and is the responsibility of the contractor to transport the unit(s) to the exact site of installation Storage and Handling The contractor shall exercise care in the storage and handling of the SCBFD(s) and its components prior to and during installation. Any repair or replacement costs associated with events occurring after delivery is accepted, and unloading has commenced shall be born by the contractor. The SCBFD(s) and its components shall always be stored indoors and transported inside the original shipping container(s) until the SCBFD(s) are ready to be installed. The SCBFD shall always be handled with care and lifted according to OSHA and NIOSA lifting recommendations and/or contractor s workplace safety professional recommendations Maintenance and Inspection Inspection After installation, the contractor shall demonstrate that the SCBFD has been properly installed at the correct location(s), elevations, and with appropriate supports and fasteners. All components associated with the SCBFD and its installation shall be subject to inspection by the engineer of work, governing agency, and the manufacture at the place of installation. In addition, the contractor shall demonstrate that the SCBFD has been installed per the manufacturer s specifications and recommendations. SCBFD(s) shall be physically inspected regularly in accordance to owner s Stormwater Pollution Prevention Plans (SWPPP) and manufacture s recommendations. An inspection record shall be kept by the inspection operator. The record shall include the condition of the SCBFD and its appurtenances. The most current copy of the inspection record shall always be copied and placed in the owner s SWPPP Maintenance Routine maintenance and cleaning time of the SCBFD shall take no more than 15 minutes. Routine maintenance and cleaning time shall be field test certified by a third party per section SCBFD(s) must be completely maintained from outside the catch basin. The SCBFD(s) shall be inspected, maintained and cleaned 2 to 4 times a and/or in accordance to owner s Stormwater Pollution Prevention Plans (SWPPP). The maintenance shall be preformed by someone qualified. A Maintenance Manual is available upon request from the manufacturer. The manual has detailed information Stormwater Catch Basin Filtration Device Page 5 of 6

6 regarding the maintenance of the SCBFD. A Maintenance Record shall be kept by the maintenance operator. The Maintenance Record shall include any maintenance activities preformed, amount and description of debris collected, and the condition of the filter. The most current copy of the Maintenance Record shall always be copied and placed in the owner s SWPPP Material Disposal - All debris, trash, organics, and sediments captured and removed from the SCBFD shall be transported and disposed of at an approved facility for disposal in accordance with local and state regulations. Please refer to state and local regulations for the proper disposal of toxic and non-toxic material. PART 5 QUALITY ASSURANCE Warranty The manufacturer shall guarantee the SCBFD against all manufacturing defects in materials and workmanship for a period of (8) years from the date of delivery to the contractor. The manufacturer shall be notified of repair or replacement issues in writing within the warranty period. The SCBFD is limited to recommended application for which it was designed. [End of This Section] Stormwater Catch Basin Filtration Device Page 6 of 6